Module: Jade::Stdlib::Text

Extended by:
Text
Included in:
Text
Defined in:
lib/jade/stdlib/text.rb

Overview

Text representations of stdlib types, read in Ruby. Lives here rather than in Decimal / Clock / Calendar: those import Decode, so the instance cannot be registered the other way round. The types are compiled Jade, so constants resolve on first use.

Accepts exactly what the Jade parsers did, down to String.to_int being Integer(s, 10) — whitespace and underscores included.

Constant Summary collapse

EPOCH_RATA_DIE = 
719163
DAY_MS = 
86_400_000

Instance Method Summary collapse

Instance Method Details

#from_instant(instant) ⇒ Object

Seconds precision, always UTC. rjust matches pad_to, which left-pads without truncating: a negative year renders "00-5".



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# File 'lib/jade/stdlib/text.rb', line 63

def from_instant(instant)
  ms = instant._1
  day_ms = ms % DAY_MS
  d = Jade::Calendar::Internal.from_rata_die(ms / DAY_MS + EPOCH_RATA_DIE)

  [
    pad(d.year, 4),
    '-', pad(Jade::Calendar::Internal.month_to_int(d.month), 2),
    '-', pad(d.day, 2),
    'T', pad(day_ms / 3_600_000, 2),
    ':', pad(day_ms % 3_600_000 / 60_000, 2),
    ':', pad(day_ms % 60_000 / 1_000, 2),
    'Z',
  ].join
end

#to_date(s) ⇒ Object 



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# File 'lib/jade/stdlib/text.rb', line 44

def to_date(s)
  parts = s.split('-')
  return nil unless parts.length == 3

  year, month, day = parts.map { int(it) }
  return nil unless year && month && day

  # Answers Jan outside 1..12 and never validates the day — calling
  # it keeps that. Don't cache the Months: a second compile
  # redefines the class.
  Jade::Calendar::Date[
    year,
    Jade::Calendar::Internal.month_from_int(month),
    day,
  ]
end

#to_decimal(s) ⇒ Object 



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# File 'lib/jade/stdlib/text.rb', line 16

def to_decimal(s)
  coefficient, exponent = s.split('e', 2)
  return nil unless exponent

  m = int(coefficient)
  e = int(exponent)

  m && e ? Jade::Decimal::Decimal[m, e] : nil
end

#to_instant(s) ⇒ Object

No timezone offsets: Clock.from_iso never took them either.



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# File 'lib/jade/stdlib/text.rb', line 27

def to_instant(s)
  date_part, time_part = split_dt(s)
  return nil unless date_part

  d = to_date(date_part)
  time = split_time(time_part)
  return nil unless d && time

  hour, minute, second, sub_ms = time
  days = Jade::Calendar::Internal.to_rata_die(d) - EPOCH_RATA_DIE

  Jade::Clock::Instant[
    days * DAY_MS +
      hour * 3_600_000 + minute * 60_000 + second * 1_000 + sub_ms
  ]
end